hailer

noun

USHAY-ler/ˈheɪlɚ/UKHAY-luh/ˈheɪlə/

1 meaning of hailer

1
nouncountable
A person or device that calls out, summons loudly, or hails others.
The officer raised a hailer and ordered the crowd to disperse.
On the docks, a hailer announced each ship's arrival to the waiting families.
Similarmegaphone, bullhorn, announcer, crier

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Origin

Formed from "hail" combined with the suffix "-er".